APA Edition Citation

Hurley, P. M. (1959). How old is the earth? Heimann.

Chicago Edition Citation

Hurley, Patrick M. How Old Is the Earth? London.: Heimann, 1959.

MLA Edition Citation

Hurley, Patrick M. How Old Is the Earth? Heimann, 1959.

Advarsel: Disse citationer er muligvist ikke 100% nøjagtige.